This bottle holder is designed to hold your Giraffe Bottle (and other bottles) securely. Since bottle holder is aluminium it can be adjusted to hold larger bottles. In addition, clamp is adjustable and rotates to attach to both horizontal and vertical round tubing. Fits tubing .75" to 1.25". Tightens to tubing (wheelchair, bed, desk, and more) with included 3mm hex key (allen wrench). Not designed to be repeatedly adjusted.